A term possibly relating to a type of vessel, container, or medieval trading container.
Possibly from Middle Dutch or German 'bak' (container/box) combined with a suffix; or from Portuguese 'barco' (boat) with phonetic drift. Medieval trade terminology was highly mixed across languages.
Medieval merchants used so much code-switching that their vocabularies were walking translations—'bokard' might be one of those hybrid words where Dutch met Portuguese met English!
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